A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 5910-01-442-7789
NSN 5930-01-570-6743
NSN 5895-01-083-6761
NSN 5960-01-397-1443
NSN 7035-01-459-8268
NSN 6650-01-573-4044
NSN 5910-01-525-7733
NSN 5945-01-502-5961
NSN 5895-01-245-8068
NSN 6135-01-070-3865
NSN 2925-01-029-5300
NSN 5935-01-365-4936